howabd chambers



(No Model.)

J. HUHAMBERS. DEVICE EOE SEGUEING TEMPEEING KNIVES 1N TEE PUGGING SHAETS OF BRICK MACHINES.

Patented Jan. 2

INVENTORZ www EssEsff J. HOWARD CHAMBERS, ,or risinnnfenrain, PENNSYLVANIA, crans CHAMBERS, .ituy or sAMu rnncn.

Assionon rro fifuivlct Fou Sinusite TEMPEmNc-kmvts Tir-rer PusciNG-SHAFTS or.einer'.tito-umts.Y

, SPECIFICA-rioni forming part of hrtere raient No. 356,511. dates January z5, leer.

Application filed June1 18. i836.

To all wtom it may concern,.-

Be it known that LJ. HOWARD CHAMBERS, a citizen of the United States, residing at the city and county of Philadelphia, and State of Pennsylvania, have invented new and useful Improvements in Devices for Securing Tempering-Knivcs in the Pugging-Shafts of Brick- Machines, of which the following a full, clear, and exact description, reference beingA had to the accompanying drawings, olf' which.-

Figure l is a side elevation of part of a pugging-shaftrof a brick-machine in which my invention is embodied. Fig. 2 is a-'transverse section of said shaft on a line passing through one of the knives.

This .invention relates to that class of bricksmachines wherein the clay is tempered ina case and forced out therefrom through a suiti able die by the aid of knives set at an angle upon a shaft contained within said case-such,- for example, as in the well-known Chambers brick-machines, as described in Cyrus Chambers, Jr.s Letters' Patent-.No. 275,467, dated April l0, 1883, and previous patents granted to him, and is an improvement in certain respects upon the device shown in the Letters Patent of said Cyrus Chambers, Jr.,l 0.297, 675, dated April 29, 1884.

The invention consists in recessing the shaft for the reception of the blade portion of thel knife adj agent to the shank, whereby the inner corner or edge of the blade is permitted to be brought to or below the surface of the shaft.

It also consists in making such recess for the .reception of the lower part of the blade of the knife of a width and angle with the shaft, so that the sides ci' the recess constitute a limit to the maximum and minimum set that may be given to the knife.

It consists, further, in setting the bodyof the knife below the periphery of the shaft, so that the knife will be supported above its shank'by the body of the shaft.

I will now proceed to describe the improved construction and the advantagesderived therefrom, reference being had to the annexed drawings, in whichm' v Y A is the pngging-shaft, to which the temperingknivos `b are secured by means of keys c impinging against Vthe side of the shanks d,

ScrialNo.205,540. (No model.)l

the Shanks of the temperinglknives are entered held at the proper angle or set by keys, and

ln the shaft shown in the aforesaid Letters I Patent of Cyrus Chambers, Jr., No'. 297,675,

into corresponding holes in the shaft, and there 5 5 the backsof the blades adjacent to the shaft are sustained by lugs projecting above the found to exist in that construction, which it is the object of my invention to obviate, are,

considerable frictional surf-aceto 'llelay, the kniv`es were aptto turn around too far broad side under the excessive strain andthus become broken, and the ends of the blades near a lodgnleut for the roots and stones in the clay, between the lower corner of the blade and the shaft. l do away with the said lugs and provide the shaft with recesses f in front of the depth to receive the lower end ofthe blade up to about the corner thereof, as seen in Fig.v 2, and of an angle and width (see Fig. v'1) that, while permitting the usual maximum and mini present a lateral stop for the blade of the knife so far around under the stress of advancing the clay as to' be liable to break.

first, the knives are supported above their Shanks, (th'eir weakest point,) and thus they are not so 4liable to be broken; second, the corners of the blades do not project, whereby that the aforesaid lugs or projections necessary to`support the blade presenteda very that will prevent the latter frombeing turned the shaft projecting therefrom` served toform 7C blade-shank holes e, said recesses being of a mum scope ofsetting or pitch of the blades, so4

It will be obvious that by this construction, 8 5

roots, dto., cannot lodge between them and 'the 9`o shaft; third, the shaft presents a smooth .uns broken surface, and thus 'there is less friction, and consequently less power is 'required to drive the same than heretofore, as the clay in any construction previouslyin use with which I am acquainted; fourth, theblades cannot be set by an' ignorant or unskilled person at too great or too 'little pitch, but only between certain fixed limits.

whichlatter are inserted in' heisser sockets e.

as new andwish to secure by Letters @tent- Having thusdescribed my invention, I claim can slide upon the shaft much more freely than ICC 1. The improvement in puggng-shfts for brick-machines ofthe class recited, which consists in providing the same with recesses adjacent to the usual knife-shank holes adapted 5 to receive n part of the blades oi the temperingknives, substantially as and for the purpose set forth.

2, The improvement in pugqingshufts for brick-machines of the class recited, which conlo Sists in providing the same with recesses adjacent to the knife-shank holes adapted to receive a part ofthe blades of the tmnperingknives, said recesses being of such width, as described, so that their sides form :i stop or t5 limit for the maximum and minimum sets to l be given to the blades, substantially as and for the purpose specified.

3. In combination with the pugging-shaft, the knives havingr their Shanks and the lower4 part of their blades set below the periphery zo of the sha-ft, whereby the knives are supported or re-enforced above their Shanks by the shaft,

substantially as and for the purpose specified. In testimony whereof I have hereunto affixed my signature this 24th day of May, A. D. 1886. 25

J. HO\VARD CHAMBERS.

Witnesses:

JAMES R. MAGUmn, HoWARn K. KING. 

